<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN">
<style type="text/css">

.multicol {
  margin: 1em;
  border: solid silver;
  width: 500px;
  -moz-column-width: 100px;
  -moz-column-gap: 0;
  height: 100px;
}

div {
  margin: 2px 0;
  border: 2px white;
  border-style: solid none;
}

.float {
  float: right;
  margin: 44px 0;
  width: 15px;
  background: aqua;
  border-color: aqua;
  height: 296px;
}

#float0 {
  float: left;
  width: 30px;
  margin-right: 5px;
  margin-bottom: 0;
}

#float1 {
  margin-left: -15px;
  margin-right: -5px;
  position: relative;
  right: 5px;
}
#float2 {
  margin-left: 5px;
  margin-right: 15px;
}

#clear {
  clear: left;
  border: 2px solid orange;
}

#c1 {
  height: 142px;
}

#c2 {
  border-bottom: none;
}

#c3 {
  height: 100px;
  border-bottom: 4px solid orange;
}
#c4 {
  height: 192px;
  border-bottom: 4px solid orange;
}

hr {
  border: solid orange 20px;
  border-style: none solid;
  height: 4px;
  margin: 0 -5px;
  padding: 0;
  position: relative;
  z-index: 20;
}

#c2 > hr {
  margin-top: 44px;
}
</style>

<body onload="var f = document.getElementById('float0');
              f.style.height = '20px';
              document.body.offsetHeight;
              f.style.height = '900px';
              document.body.offsetHeight;
              f.style.height = '';
              document.body.offsetHeight;
              var c = document.getElementById('c2');
              c.style.height = '900px';
              document.body.offsetHeight;
              c.style.height = '';
">

<div class="multicol">
  <div id="c1">
    <div id="c2">
      <div class="float" id="float0"></div>
      <div class="float" id="float1"></div>
      <div class="float" id="float2"></div>
      <hr>
    </div>
  </div>
  <div id="c3"><hr><div id="clear"></div></div>
  <div id="c4"></div>
</div>
